CocoaLumberjack与Swift - 调用预处理器宏 [英] CocoaLumberjack with Swift - Calling preprocessor macros

问题描述

我开始用新的编程语言Swift构建一个IOS应用程序。我设法用的CocoaPods，并能在我AppDelegate.swift成功创建与我CustomLoggerFormatter的DDTTYLogger（Objective-C的），并追加到记录器。

I started to build an IOS app with the new programming language Swift. I managed to use CocoaPods and was able to successfully create the DDTTYLogger with my CustomLoggerFormatter (Objective-C) in my AppDelegate.swift and append it to the loggers.

var customLoggerFormatter = CustomLoggerFormatter()

var consoleLogger: DDTTYLogger = DDTTYLogger.sharedInstance()
consoleLogger.setLogFormatter(customLoggerFormatter)
DDLog.addLogger(consoleLogger)

但问题是，CocoaLumberjack库正在使用预处理器宏对于记录器方法，如 DDLogVerbose（@..）

But the problem is, that the CocoaLumberjack Library is using preprocessor macros for the logger methods like DDLogVerbose(@"..")

这是在DDLog.h中定义的：

Which is defined in the DDLog.h:

#define DDLogVerbose(frmt, ...) LOG_OBJC_MAYBE(LOG_ASYNC_VERBOSE, LOG_LEVEL_DEF, LOG_FLAG_VERBOSE, 0, frmt, ##__VA_ARGS__)

是否有任何解决方法可以使预处理器定义在Swift中工作？或者有没有人尝试类似的东西并取得更大成功？

Is there any workaround to make preprocessor defines work in Swift? Or did anyone try something similar with more success?

推荐答案

好的，我刚刚找到了解决方案。编写一个Objective-C Wrapper类，调用预处理器并提供调用它的方法。

Okay, I just found a solution. Writing an Objective-C Wrapper class calling the preprocessors and offering methods to call it.

希望这有助于其他人面临同样的问题。

Hopefully this will help other people facing the same issues.

我首先创建了一个头文件：

I first created a header file:

@interface DDLogWrapper : NSObject
+ (void) logVerbose:(NSString *)message;
+ (void) logError:(NSString *)message;
+ (void) logInfo:(NSString *)message;
@end

具有相应的实施：

#import <Foundation/Foundation.h>
#import "DDLogWrapper.h"

// Logging Framework Lumberjack
#import "DDLog.h"
#import "DDASLLogger.h"
#import "DDTTYLogger.h"

// Definition of the current log level
#ifdef DEBUG
static const int ddLogLevel = LOG_LEVEL_VERBOSE;
#else
static const int ddLogLevel = LOG_LEVEL_ERROR;
#endif

@implementation DDLogWrapper

+ (void) logVerbose:(NSString *)message {
    DDLogVerbose(message);
}

+ (void) logError:(NSString *)message {
    DDLogError(message);
}

+ (void) logInfo:(NSString *)message {
    DDLogInfo(message);
}

@end

重要的是添加DDLogWrapper .h文件到ProjectName-Bridging-Header.h文件，然后你就可以在Swift中实例化DDLogWrapper并调用方法 logVerbose，logError，logInfo。。

Important is to add the DDLogWrapper.h File to the ProjectName-Bridging-Header.h file and then you are able to instantiate in Swift the DDLogWrapper and call the methods logVerbose, logError, logInfo..

使用以下代码我能够做出日志声明：

With the following code I was able to make a log statement:

DDLogWrapper.logVerbose("TEST");

这篇关于CocoaLumberjack与Swift - 调用预处理器宏的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！